Object reference not set to an instance of an Object/ Object Pooling

Hi Guys,

I am having issues with my object pooling script right now because of two errors detected in the Unity Console. The 1st error is a MissingReferenceException:

" MissingReferenceException: The variable enemyPrefab of EnemyPool doesn't exist anymore.
You probably need to reassign the enemyPrefab variable of the 'EnemyPool' script in the inspector.
UnityEngine.Object.Internal_InstantiateSingle (UnityEngine.Object data, Vector3 pos, Quaternion rot) (at C:/buildslave/unity/build/artifacts/generated/common/runtime/UnityEngineObjectBindings.gen.cs:52)
UnityEngine.Object.Instantiate (UnityEngine.Object original, Vector3 position, Quaternion rotation) (at C:/buildslave/unity/build/Runtime/Export/UnityEngineObject.cs:155)
UnityEngine.Object.Instantiate[GameObject] (UnityEngine.GameObject original, Vector3 position, Quaternion rotation) (at C:/buildslave/unity/build/Runtime/Export/UnityEngineObject.cs:205)
EnemyPool.Start () (at Assets/EnemyPool.cs:24)"

The second issue is an Object reference not set to an instance of an Object:

NullReferenceException: Object reference not set to an instance of an object
EnemyPool.Update () (at Assets/EnemyPool.cs:36)

The script is pasted below. Any help would be appreciated! Thank You!.


"using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class EnemyPool : MonoBehaviour {
public int enemyPoolSize = 10;
public GameObject enemyPrefab;
public float spawnRate = 4f;
public float enemyMin = 1f;
public float enemyMax = 3.5f;
private float spawnXPosition = 10f;
private int currentEnemy = 0;

private GameObject[] enemies;
private Vector2 objectPoolPosition = new Vector2(-15f, -25f);
private float timeSinceLastSpawned;

// Use this for initialization
void Start () {

enemies = new GameObject[enemyPoolSize];
for (int i = 0; i < enemyPoolSize; i++)
{
enemies = (GameObject)Instantiate(enemyPrefab, objectPoolPosition, Quaternion.identity);
}

}

// Update is called once per frame
void Update () {
timeSinceLastSpawned += Time.deltaTime;
if (GameControl.instance.gameOver == false && timeSinceLastSpawned >= spawnRate)
{
timeSinceLastSpawned = 0;
float spawnYPosition = Random.Range(enemyMin, enemyMax);
enemies[currentEnemy].transform.position = new Vector2(spawnXPosition, spawnYPosition);
currentEnemy++;
if (currentEnemy >= enemyPoolSize)
{
currentEnemy = 0;
}
}

}
}"

 

Hey, please use tags when posting code: https://forum.unity.com/threads/using-code-tags-properly.143875/

Anyway, you're not assigning your "enemies" array correctly. Compare this to the code in your Start method;

Code (CSharp):

1. enemies[i] = (GameObject)Instantiate(enemyPrefab, objectPoolPosition, Quaternion.identity);